<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>其他页面</title>
    <style>
      * {
        font-size: 28px;
      }
    </style>
  </head>
  <body>
    <div>消息:</div>
    <div id="message"></div>

    <script>
      window.addEventListener("storage", function (ev) {
        console.log("ev:", ev);
        message.textContent = JSON.stringify({
          oldValue: ev.oldValue,
          newValue: ev.newValue,
        });
      });
    </script>
  </body>
</html>
